Integrate Dynatrace Lambda Layer on container images
As an addition to Lambda function deployment as a ZIP file, AWS Lambda offers Lambda function deployment as container images.
The container image must include the files and configuration required to run the function code. The same applies to the files and configuration of Dynatrace AWS Lambda Layer, once monitoring is enabled for the containerized Lambda function.
In a ZIP file function deployment, the Dynatrace artefacts are attached to the function with an AWS Lambda extension (which is a Lambda layer with an extension-specific folder layout).
A Lambda layer, like a function bundle, is a ZIP file extracted at function cold start time to the /opt
folder of the AWS Lambda function instance.
See below for how to enable Dynatrace monitoring for a containerized Lambda function.
Configuration
Add Dynatrace AWS Lambda extension to the container image
Configuration
-
Go to Trace Python, Node.js, and Java Lambda functions and follow the Configure with environment variables instructions.
-
Open the projects
Dockerfile
in an editor and copy the environment variables from the deployment screen. Each line must be prefixed withENV
and spaces around the equal signs must be removed.
ENV AWS_LAMBDA_EXEC_WRAPPER=/opt/dynatrace
ENV DT_TENANT=abcd1234
ENV DT_CLUSTER_ID=1234567890
ENV DT_CONNECTION_BASE_URL=https://abcd1234.live.dynatrace.com
ENV DT_CONNECTION_AUTH_TOKEN=dt0a01...
Add OneAgent extension to the container image
- Download the contents of the Dynatrace AWS Lambda extension. There are two ways to do this:
- via dt-awslayertool—this is a utility for downloading or cloning AWS Lambda layers to the local file system
- via AWS CLI—see below for instructions
Example command:
dt-awslayertool pull arn:aws:lambda:us-east-1:725887861453:layer:Dynatrace_OneAgent_1_207_6_20201127-103507_nodejs:1 --extract DynatraceOneAgentExtension
This will download the layer
arn:aws:lambda:us-east-1:725887861453:layer:Dynatrace_OneAgent_1_207_6_20201127-103507_nodejs:1
and
extract its contents to the local folder DynatraceOneAgentExtension
.
Example command:
curl $(aws --region us-east-1 lambda get-layer-version-by-arn --arn arn:aws:lambda:us-east-1:725887861453:layer:Dynatrace_OneAgent_1_207_6_20201127-103507_nodejs:1 --query 'Content.Location' --output text) --output layer.zip
unzip -d DynatraceOneAgentExtension layer.zip
This will download and extract
arn:aws:lambda:us-east-1:725887861453:layer:Dynatrace_OneAgent_1_207_6_20201127-103507_nodejs:1
contents
to local folder DynatraceOneAgentExtension
.
The AWS region specified in the --region
command line parameter must match the region in the layer ARN.
- Use the following
Dockerfile
commands to copy the downloaded extension content into the container image and ensure that the shell script file/opt/dynatrace
is executable.
COPY DynatraceOneAgentExtension/ /opt/
RUN chmod +x /opt/dynatrace
Sample Dockerfile
with Dynatrace AWS Lambda extension enabled
This sample project creates a containerized Node.js Lambda function.
The project folder has the following files and folders:
containerized-lambda-sample
├── Dockerfile
├── DynatraceOneAgentExtension
└── index.js
The content of the Dynatrace AWS Lambda Layer is assumed to be downloaded and extracted (as outlined above) to the folder DynatraceOneAgentExtension
.
The handler function is exported by the index.js
file:
exports.handler = async () => {
return "hello world";
}
The Dockerfile
with the modifications applied to integrate Dynatrace AWS Lambda extension to the containerized function:
FROM public.ecr.aws/lambda/nodejs:12
COPY index.js ${LAMBDA_TASK_ROOT}
# --- Begin of enable Dynatrace OneAgent monitoring section
# environment variables copied from Dynatrace AWS Lambda deployment screen
# (prefix with ENV and remove spaces around equal signs)
ENV AWS_LAMBDA_EXEC_WRAPPER=/opt/dynatrace
ENV DT_TENANT=abcd1234
ENV DT_CLUSTER_ID=1234567890
ENV DT_CONNECTION_BASE_URL=https://abcd1234.live.dynatrace.com
ENV DT_CONNECTION_AUTH_TOKEN=dt0a01...
# copy Dynatrace OneAgent extension download and extracted to local disk into container image
COPY DynatraceOneAgentExtension/ /opt/
# make /opt/dynatrace shell script executable
RUN chmod +x /opt/dynatrace
# --- End of enable Dynatrace OneAgent monitoring section
CMD [ "index.handler" ]
Limitations
Monitoring via Dynatrace AWS Lambda extension on container images is supported only for images created from an AWS base image for Lambda.
Additional resources
For more information on the Lambda container images, see: